Erosion :)
Flood waters cause rivers to scour out their beds, leaving a enter channel.
erosion. and due to that erosion we get sedimentary rock.
An example of weathering abrasion is when rocks and pebbles carried by a river rub against the riverbed, causing both the rocks and the riverbed to wear down over time due to the abrasive action of the particles. This process results in the smoothing and rounding of the rocks and the deepening of the riverbed.
The abraision of rocks can happen when one rock hits another, when river rocks tumble in the riverbed by fast moving water, by blowing sand particles hitting the rock, and when rocks grind against each other.
Evolution
The three ways of river erosion are hydraulic action (force of water on the river banks), abrasion (wearing down of the riverbed by sediment), and attrition (erosion caused by rocks and sediment carried by the river rubbing against each other).
A rock is a mixture of compounds.
Riverbeds are typically made of a combination of soil, sediment, rocks, and other natural materials that have been eroded and transported by the flowing water. The composition of a riverbed can vary depending on factors such as the type of rock in the area, the speed of the water, and the amount of sediment carried by the river.
Abrasion. (~the process of scraping or wearing away)
The two erosional processes found in rivers are mainly attrition and vertical hydraulic action. Attrition is where the moving river water dislodges materials like rocks on the sides of the river and carries them with the flow. Vertical hydraulic action is where moving water removes materials from the riverbed and carry it with the flow. This causes less resistant rocks to be eroded and thus forming a plunge pool, or waterfall.
Sedimentary rocks, such as sandstone, shale, or conglomerate, are likely to be found in an ancient riverbed on the Earth's surface. These rocks are formed from the accumulation and compaction of sediments carried by rivers over time.
This process is called erosion, where the force of the flowing water wears away the soil, rocks, or sediment along the riverbed or riverbanks. Erosion can lead to changes in the shape and direction of the river over time, impacting the surrounding landscape and habitats. Measures such as riprap or vegetation planting can help mitigate erosion along riverbanks.